Trolley-shoe guard



May 17 1927,.

' w. SCHAAKE TROLLEY SH/OE GUARD Filed March 26. 1925 2 Sheets-Sheet I I I TTOR'NEY INVENTOR W////'am 5:600 /re.

BY w 4 1 WIT ESSES:- /%ZMV/ Patented May 17, 1927.

" UNITED I STATES WILLIAM SCHAAKE, or PITTSBURGH, PENNSYLVANIA, ASSIGNOR To WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION on PENNSYLVANIA.-

TROLLEY-SHOE GUARD.

Application filed March 26, 1925. Serial No. 18,408.

My invention relates to current-collector devices, more particularly to protective devices for current-collectors of the pantograph type.

It is among the objects of my invention to provide protective means for pantograph trolley structures which shall constitute parts of certain frame portions and which may be readily dismembered or attached to the pantograph frame.

Another object of my invention is to provide a protective device for pantograph current-collecting devices which shall be associated with the current-collector in a man-. nor to constitute guards for preventing en-.

tanglement with the overhead line construction.

Still another object of my invention is to provide a pantograph structure with a guard which shall be of simple, durable, and inexpensive construction and which shall be adapted for application to standard pantograph collector devices.

In the operation of electric railway vehicles utilizing extensible pantograph current-collectors, difficulties are encountered as regards the breakage and destruction of the trolley wire and other overhead construction by reason of entanglement of the current-collector shoe therewith.

My present invention obviates these difiiculties in that I provide a guard for the current-collector shoe that prevents the catching of the overhead structure by the shoe horn or ends of the current-collector.

In the accompanying drawings, constituting a part hereof and in which like reference characters designate like parts:

Figure 1 is a view in end elevation of an extensible pantograph structure embodying the principles of my invention, and

Fig. 2 is a view in side elevation thereof, showing the pantograph frame in its extended position.

Referring to Fig. 1, the structure therein illustrated comprises an extensible frame embodying the usual side frame members 1 and 2 having pivotal joints 3 and suitable cross braces 4 to provide adequate rigidity and strength. The pantograph frame is mounted in the usual manner upon supporting insulators 5, which are secured by mounting brackets 6 to the roof of an electric railway vehicle (not shown). The frame portions are connected to the operat- In accordance with my present invention,

I provide guard members 12, which may constitute integral members or built-up sections that are secured to the frame portions 2 and 4: by suitable mounting brackets 13, as shown in Fig. 1. Each guard'member constitutes a brace between the corresponding frame members 2 and is shaped to provide looped ends 14 that extend beyond the ends of the horns 11. These looped ends protect the horns and prevent entanglement of the latter with the overhead line construction. Moreover, because of their looped shape, they increase the strength and rigidity of the pantograph frame.

The looped ends constituting the guards may be shaped in any suitable manner to constitute an endless frame portion so related to the horns 11 as to prevent access to the open ends thereof.

It is evident from the foregoing description of my invention that pantograph frame construction made in accordance therewith provides a safe means for pantograph operation in railway service and that the guard members are of light, durable and relatively inexpensive construction and adapted for service on standard pantograph frames without any alteration of the main frame members. 7

Although I have described a specific embodiment of my invention, it will be obvious to those skilled in the art that various modifications may be made in the details of construction without departing from the principles herein set forth.

I vclaim as my invention:

1. A current-collector device comprising an extensible pantograph frame, a collector shoe secured thereto, and a guard member comprising a transversely extending member secured to the pantograph frame inde an extensible pantograph frame, a collector shoe secured thereto, and provided With end horns, and a guard secured to said frame independently of said shoe having looped ends extending beyond the horns of said shoe.

8. A current-collector device comprising an extensible pantograph frame, a collector shoe secured thereto and provided with end horns, and a guard secured independently of said shoe and having looped ends extending beyond the horns of said shoe.

4. A current-collector device comprising an extensible pantograph frame, a collector shoe secured thereto and provided With end horns, and a guard Secured independently of said shoe and having'looped ends extending beyond the horns of said shoe, said guard constituting a brace for said frame as Well as a guard for said horns.

5. A current-collector device comprising an extensible pantograph frame, a collector shoe mounted thereon and provided With end horns, and a guard secured to said frame underneath and independently of said shoe, said guard having looped ends extending beyond the horns of said shoe.

In testimony whereof, I have hereunto subscribed my name this 13th day of March, 1925.

WVILLIAM SCI-IAAKE. 

